Herman v



(No Model.)

H. V. BERNHARDT. TOOL FOR EXPANDING RINGS.

Patented Mar. 13, 1894.

Unrrn TATES HERMAN V. BERNHARDT, OF BROOKLYN, ASSIGNOR TO THE J. B.BOWDEN & COMPANY, OF NEW YORK, N. Y.

TOOL FOR EXPANDING RINGS.

$PECIFICATION forming part of Letters Patent No. 516,180, dated March13, 1894.

I Application filed November 26, 1892. Serial No. 453.247. (No model.)

To all whom it may concern:

Be it known that I, HERMAN V. BERNHARDT, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented a certain new and useful Improved Tool for Expanding ftings, ofwhich the following is a specifica- My invention is especially designedfor the manufacture of rings from ornamented annular blanks, the objectbeing to preserve the ornamentation on the finished ring withoutblemish.

The mechanism employed in carrying out the invention is useful inconnection with a ring formed by any of the well known or suitablemethods, to expand the same to any required size, whether the ring beornamented or not.

'20 In the accompanying drawings forming part of this specification,Figure l represents a swage, which, in conjunction with its die, willalways expand a ring to a given size, and hence when such swages areused it will be necessary to provide one for each size ring desired.Fig. 2 is a vertical elevation, partly in section, of a sizing tool,showing the ring in place before expansion. Fig. 3 is a plan view of thedie shown in Fig. 2,

o partly in section, with the ring in place before expansion. Fig. 4 isa plan view, similar to that shown in Fig. 3, showing the ring afterexpansion. Fig. 5 is a side view of one of the sliding jaws. Fig. 6 is atop View of 5 the same. Fig. 7 is a sectional elevation of a dieoperating as does the die shown in Figs.

2, 3 and 4 but without provision for protecting the inner face of thering, which, when such die is used, should not be ornamented.

In this figure the ring is shown before expansion. Fig. 8 is anelevation of the die shown in Fig. 7,but with the ring expanded. We willassume that the ring is made with ornamentation on both sides, or on oneside only, or provided with ornamentation in any other way, or iswithout ornamentation.

Referring to Figs. 2 to 8 inclusive, 1) representsthe bed-plate-of thefemale member of the sizing tool. 0 represents the movable jaws thereof,of which six are shown. These jaws, as shown in Figs. 2 to 6, are formedwith a flange d, and are arranged to slide between side guide-pieces orcheeks-e'and the bedplate I) at the bottom'and a guide-piece f on thetop side thereof. Each sliding jaw is provided with a spring, which maybe a flat spring as shown at g, or a coiled spring as shown at h. In thelatter case the rear end of the sliding jaw is recessed and the coiledspring placed therein abutting at its outer end against a portion of thebed-plate b. The swaging tool may be either a tapering one graduated toindicate the different sizes as shown at Z, Fig. 2, or a tapering swagewith a straight portion as shown at 'i, Fig. 1. In expanding the ring,it is placed around the flanges (Z of the various sliding jaws, whichflanges are in the form of an annulus when closed, as shown in Fig. 3,and of a size on the outer periphery thereof to receive the ring. If thering is ornamented on both sides, a washer of leather j is placed aroundthe said flange between it and the ring. Upon the introduction of thetapering tool Z, it will be seen that the sliding jaws will be forcedapart, and hence will expand the ring regularly without marring itsornamentation, none' of the metal parts of the sizing tool coming incontact therewith. If the sizing tool '11 is used, the operation will bethe same, but for different sizes of rings separate swages 'i must beused. The use of the swage 1', however, has the advantage of providingthe ring with a straight inner wall, instead of, as occurs when thetapering tool Z is used in connection with the die of Figs. 7 and 8, aninclined inner wall.

Figs. 7 and 8, it will be seen, differ from Figs. 2, 3 and 4 only in theomission of the flanges d on the sliding jaws. This omission is madewhen the ring is not ornamented on the inner side, the metal of theswage then coming in direct contact with the inner side of the ring andexpanding it in that manner. Of course either of the tools justdescribed might be used for sizing rings which were not provided withornamentation.

I claim- 1. In a device for expanding rings, the combination of abase,movable jaws in saidbase adapted to support; a ring, springs placed indrel 01' swage for driving said jaws apart; to IO recesses in said jawsand tending to move expand the rlng, substantially as setforth.

the same toward a common center and a I This specification signed andwitnessed mandrel or swage for expanding said ring, this 18th day ofNovember, 1892. substantially as set forth. HERMAN V BERNHARDT.

2. In a device for expanding rings, the (30111- bination of a base,movable jaws in said base lVitnesses: having flanges arranged at anangle to said EUGENE CONRAN, jaws and adapted to enter a ring,and a man-GEORGE E. BUCHANAN.

